MITSUBISHI ELECTRIC Mitsubishi Split-Type - Manual (Page 16)

16
OPERATION INDICATOR
Not lighted
Blinking
Lighted
OPERATION INDICATOR
Not lighted
Blinking
Lighted
NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first
detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with
OPERATION INDICATOR lamp flashing.
No.
1
Symptom Operation indicator lamp Detection method Check point
Abnormal
point
0.5-second ON
0.5-second OFF
When the electricity is not conducted to the
interlock switch (Fan) of the horizontal vane.
• Refer to 9-6. E "Check of
installation of the horizontal
vane".
Indoor unit
and outdoor
unit do not
operate. Attachment
of the
horizontal
vane
All lamps flash at the same time.
No. Symptom Operation indicator lamp Detection method Check point
Abnormal
point
1
MXZ type
Operation
mode
setting Outdoor unit
operates but
indoor unit
does not
operate. When the operation mode of the each indoor
unit is differently set to COOL(includes DRY)
and HEAT at the same time, the operation
mode of the indoor unit that has operated at
first has the priority.
• Unify the operation mode.
Refer to service manual
OB377.
2.5-second OFF
Right lamp flash
· Flashing of OPERATION INDICATOR lamp (all lamps) indicates abnormality.
· Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates
abnormality.
· OPERATION INDICATOR lamp (left-hand side lamp) is lighted.
NOTE : Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
Self check table
9-5. Trouble criterion of main parts
MSZ-GA22VA - MSZ-GA25VA - MSZ-GA35VA -
E1 E1 E1
Part name Figure Check method and criterion
Indoor fan motor(MF)
Measure the resistance with a tester. (Part temperature 10˚C ~ 30˚C)
Normal
8 k " ~ 20 k "
Abnormal
Open or short-circuit
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(MAIN), RT13(SUB))
Horizontal vane
motor(MV)
Normal
BRN-other one
Abnormal
Open or short-circuit
Measure the resistance between the terminals with a tester.
(Part temperature 10
° C ~ 30 ° C)
235 " ~ 255 "
Color of the lead wire
Check 9-6. A .
RED
YLW
BRN
ORN GRN
ROTOR
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